Artículo
Nanocrystallization Kinetics Understood as Multiple Microprocesses Following the Classical Theory of Crystallization
Autor/es | Manchón Gordón, Alejandro F.
Blázquez Gámez, Javier Sebastián Conde Amiano, Clara Francisca Conde Amiano, Alejandro |
Departamento | Universidad de Sevilla. Departamento de Física de la Materia Condensada |
Fecha de publicación | 2016 |
Fecha de depósito | 2023-06-14 |
Publicado en |
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Resumen | In this work, we propose a model for using the classical Johnson-Mehl-Avrami-Kolmogorov (JMAK) crystallization theory to analyze nanocrystallization processes as a set of multiple microprocesses. This model is based on the ... In this work, we propose a model for using the classical Johnson-Mehl-Avrami-Kolmogorov (JMAK) crystallization theory to analyze nanocrystallization processes as a set of multiple microprocesses. This model is based on the well-known microstructure observations of nanocrystalline systems for which, although the number of crystallites increases along the process, the growth of each crystallite is limited to a much shorter time than the needed one for completing the process. The very low values of the Avrami exponent, n∼1, are well reproduced assuming a set of multiple classical JMAK processes with constant nucleation rate and diffusion controlled growth, ni = 2.5 for each i individual microprocess. It is shown that the values of Avrami exponent experimentally observed and lying out of the theoretical range can be assumed as effective values derived from a complex process consisting of multiple microprocesses, which can be individually treated as classical ones. |
Agencias financiadoras | Ministerio de Economía y Competitividad (MINECO). España European Commission (EC). Fondo Europeo de Desarrollo Regional (FEDER) Junta de Andalucía Ministerio de Educación y Cultura (MEC). España |
Identificador del proyecto | MAT2013-45165-P |
Cita | Manchón Gordón, A.F., Blázquez Gámez, J.S., Conde Amiano, C.F. y Conde Amiano, A. (2016). Nanocrystallization Kinetics Understood as Multiple Microprocesses Following the Classical Theory of Crystallization. Journal of Alloys and Compounds, 675, 81-85. https://doi.org/10.1016/j.jallcom.2016.03.087. |
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